I'm sure that Bob will not release the plans until he is satisfied after flying a lot of hours. Also he doesn't overstate any performance numbers. But, no one builds as light weight as Bob. The prototype 4 seat Bearhawk really had an EW of 1190 lbs, but listed as 1200 lbs. Lightest weight 4 seat Bearhawk that I know of was 1245 lbs. Said he put in a little heaver interior and more paint than Bob's Bearhawk.